How To Sign Out Using When Using Google+ Sign-In

Question

Google documents there gapi.auth.signOut() method here: https://developers.google.com/+/web/signin/#sign-out

The catch is that it says you can only call

Answer 1

The button just has to be in the DOM, it doesn't have to be showing. What seems to work well is:

1. Create a hidden element and attach the gapi handler with gapi.signin.render
2. Wait for the immediate_failed error - display the button then
3. Otherwise, accept the signed in callback, and display the logout button

Then you'll get a callback every time, but only show the button when signed out.